Fan coil is an air conditioning unit. In condensate drain valve arrangements described in published United Kingdon patent application No. 2038032A as for use in steam systems, sensing elements for insertion in the steam systems for triggering electronic circuits for controlling operation of the drain valves of the arrangements are electrical sensing probes operated in dependence upon condensate being present, or not present, at the level of the probe.
It has an added benefit of resulting zero compressed air losses and has several different types of drain valve including- Eco auto drain valve, condensate drain Pneumatic, Electronic, Solenoid, level sensor, automatic, air pipe, water, No air loss, compressed air tank and moisture drain valve.

If, due to the pipe layout, this steam cannot be displaced, it will prevent the condensate that is forming upstream of the steam reaching the drain valve, which therefore remains closed, and hence the condensate is not discharged, or rather it is not discharged until, in time, the steam in the steam lock condenses and the drain valve opens again.
At the conclusion of a timing cycle, and until initiation of the next timing cycle, timer circuit pin (3) is at zero volts and the transistors and solid state switches generally referenced 32 in the electronic circuit 24 switch the coil 31 to its energised condition.
For instance, moisture can wash lubrication from air tools and production equipment causing downtime and maintenance; an inconsistent supply of dry air can cause production quality problems; and excessive rust and scale can form in the air distribution system.

This is Granzow's standard electronic drain valve timer. We don't recommend replacing gaskets in plastic drain valves. When the condensate rises to a certain level, the drain valve opens and discharges the condensate. Our Condensate Drain gives you fully automatic and completely dependable condensate removal from compressed air systems and industrial steam systems.
ECO-DRAIN condensate drains are available for compressor flow rates up to 3500 cfm. The MS LWS water separator of the MS series effectively removes condensate from the compressed air. We are here to make sure you get all of the MACAIR products and services that you depend on, backed by PUREGAS, an industry leader in the Compressed Air Treatment Market for more than 60 years.
Condensate drain valve products are most popular in Southeast Asia, South America, and Domestic Market. For over two decades this has been a proven standard for drainage of systems, air dryers, coolers and filters. Major Electronix handles the line of condensate drain valves from Jorc.